nathch 555e7c632b Add logging for error conditions when reading or writing backup enabled
state.

Also add debug logging when reading or writing backup enabled state to
be able to better investigate bugs.

Bug: 148587496
Bug: 147352819

Test: atest -v RunBackupFrameworksServicesRoboTests
Test: atest -v $(find frameworks/base/services/tests/servicestests/src/com/android/server/backup -name '\''*Test.java'\'')'
Change-Id: I3c9b158ce57558daa5437cebe6aa0a0c924692fc
2020-01-30 13:22:41 +00:00
..
2019-05-01 05:47:15 +00:00
2019-05-01 05:48:29 +00:00